* {
    /* 全局配置 */
    margin: 0;
    padding: 0;
}

body {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(200deg, #cbdcf5, #fce7ef);
}

.container {
    background-color: #fff;
    width: 650px;
    height: 415px;
    border-radius: 5px;
    box-shadow: 5px 5px 5px rgba(0, 0, 0, 0, 1);
    position: relative;
}

.form-box {
    position: absolute;
    top: -10%;
    left: 3%;
    background-color: #bcb7d8;
    width: 330px;
    height: 500px;
    border-radius: 5px;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0, 1);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2;
    transition: 0.5s ease-in-out;
}

.register-box,
.login-box,
.threelogin-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
}

.login-box p {
    font-size: 12px;
    letter-spacing: 2px;
    color: #8e9aaf;
    text-align: center;
}

.threelogin-box img {
    border-radius: 100%;
    overflow: hidden;
    margin-right: 10px;
    width: 40px;
    height: 40px;
    opacity: 0.9;
}

.threelogin-box a {
    display: inline-block;
    font-size: 18px;
    margin: 18px 0;
}

.threelogin-box p {
    display: inline-block;
    vertical-align: top;
    font-size: 18px;
    color: #efebf5;
    margin: 10px 0;
    text-align: center;
}

.hidden {
    display: none;
    transition: 0.5s;
}

h1 {
    text-align: center;
    margin-bottom: 25px;
    /* 大写 */
    text-transform: uppercase;
    color: #fff;
    /* 字间距 */
    letter-spacing: 5px;
}

input {
    background-color: transparent;
    width: 70%;
    color: #fff;
    border: none;
    /* 下边框样式 */
    border-bottom: 1px solid rgba(255, 255, 255, 0, 4);
    padding: 10px 0;
    text-indent: 10px;
    margin: 8px 0;
    font-size: 14px;
    letter-spacing: 2px;
}

input::placeholder {
    color: #fff;
}

input:focus {
    color: #6262ad;
    outline: none;
    border-bottom: 1px solid #a262ad80;
    transition: 0.5s;
}

input:focus::placeholder {
    opacity: 0;
}

.form-box button {
    width: 70%;
    margin-top: 12px;
    margin-bottom: 12px;
    background-color: #f6f6f6;
    outline: none;
    border-radius: 8px;
    padding: 13px;
    color: #6262ad;
    letter-spacing: 2px;
    border: none;
    cursor: pointer;
}

.form-box button:hover {
    background-color: #6262ad;
    color: #f6f6f6;
    transition: background-color 0.5s ease;
}

.con-box {
    width: 50%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
}

.con-box.left {
    left: -2%;
}

.con-box.right {
    right: -2%;
}

.con-box h2 {
    color: #8e9aaf;
    font-size: 25px;
    font-weight: bold;
    letter-spacing: 3px;
    text-align: center;
    margin-bottom: 4px;
}

.con-box p {
    font-size: 12px;
    letter-spacing: 2px;
    color: #8e9aaf;
    text-align: center;
}

.con-box span {
    color: #bcb7d8;
}

.con-box img {
    border-radius: 100%;
    overflow: hidden;
    width: 150px;
    height: 150px;
    opacity: 0.9;
    margin: 20px 0;
}

.con-box button {
    margin-top: 2%;
    margin-bottom: 2%;
    background-color: #fff;
    color: #6262ad;
    border: 1px solid #bcb7d8;
    padding: 6px 10px;
    border-radius: 5px;
    letter-spacing: 1px;
    outline: none;
    cursor: pointer;
}

.con-box button:hover {
    background-color: #bcb7d8;
    color: #fff;
}

